Gadwall drake (Anas strepera).Gadwall drake (Anas strepera).Gadwall drake (Anas strepera) standing in native prairie.Gadwall hen.Gadwall ducks in prairie pothole (Anas strepera).Gadwall ducks in prairie pothole (Anas strepera).Gadwall drake (Anas strepera)Gadwall drake (Anas strepera).Gadwall drake (Anas strepera).Gadwall drake (Anas strepera) walking in native prairie.Gadwall hen on edge of wetland (Anas strepera); native prairie.Gadwall drake (Anas strepera) in summer molt.Gadwall drake (Anas strepera) in summer molt.Molting Gadwall drake.Gadwall drake (Anas strepera)Gadwall drake (Anas strepera). Gadwall Pairs